Considering the large amount of slow in this build, the spike traps, and the massive vault distance, I can only assume that this build is meant for long ranged play. With that said, Fan of Knives makes no sense. FoK is best for when you're in the middle of combat, which this build definitely won't be. You also need a nice reliable damage dealer, so I replaced FoK with golden runed Rapid Fire. Good damage, very usable, great for ranged, and most importantly cheap, because you don't have a lot of hatred in this build. With FoK removed you don't have much of a use for numbing traps, so I added caltrops with crimson for more damage + slow (replacing spider companion. It serves the same function but better in pretty much every way, except for the cost which is covered by your natural regen + multishot). It also justifies the rune on multishot, which before was a little lost. Steady Aim is probably a better passive than tactical advantage for this build too, but that one's up to you.

Considering the large amount of slow in this build, the spike traps, and the massive vault distance, I can only assume that this build is meant for long ranged play. With that said, Fan of Knives makes no sense. FoK is best for when you're in the middle of combat, which this build definitely won't be. You also need a nice reliable damage dealer, so I replaced FoK with golden runed Rapid Fire. Good damage, very usable, great for ranged, and most importantly cheap, because you don't have a lot of hatred in this build. With FoK removed you don't have much of a use for numbing traps, so I added caltrops with crimson for more damage + slow (replacing spider companion. It serves the same function but better in pretty much every way, except for the cost which is covered by your natural regen + multishot). It also justifies the rune on multishot, which before was a little lost. Steady Aim is probably a better passive than tactical advantage for this build too, but that one's up to you.

While it is true I plan to keep my distance, I keep FoK to deal massive damage to enemies that can close distance rapidly (Leapers, mods with teleport or even flying mods that can go through walls in narrow spaced area).